content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.flowable.internal.operators;
  
  import static org.junit.Assert.*;
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.*;
  
  import java.util.*;
  import java.util.concurrent.atomic.*;
  
  import org.junit.Test;
  import org.reactivestreams.Subscriber;
  
  import hu.akarnokd.reactivestreams.extensions.FusedQueueSubscription;
  import io.reactivex.common.functions.*;
  import io.reactivex.common.internal.functions.Functions;
  import io.reactivex.flowable.*;
  import io.reactivex.flowable.subscribers.*;
  
  public class FlowableRangeLongTest {
  
      @Test
      public void testRangeStartAt2Count3() {
          Subscriber<Long> observer = TestHelper.mockSubscriber();
  
          Flowable.rangeLong(2, 3).subscribe(observer);
  
          verify(observer, times(1)).onNext(2L);
          verify(observer, times(1)).onNext(3L);
          verify(observer, times(1)).onNext(4L);
          verify(observer, never()).onNext(5L);
          verify(observer, never()).onError(any(Throwable.class));
          verify(observer, times(1)).onComplete();
      }
  
      @Test
      public void testRangeUnsubscribe() {
          Subscriber<Long> observer = TestHelper.mockSubscriber();
  
          final AtomicInteger count = new AtomicInteger();
  
          Flowable.rangeLong(1, 1000).doOnNext(new Consumer<Long>() {
              @Override
              public void accept(Long t1) {
                  count.incrementAndGet();
              }
          })
          .take(3).subscribe(observer);
  
          verify(observer, times(1)).onNext(1L);
          verify(observer, times(1)).onNext(2L);
          verify(observer, times(1)).onNext(3L);
          verify(observer, never()).onNext(4L);
          verify(observer, never()).onError(any(Throwable.class));
          verify(observer, times(1)).onComplete();
          assertEquals(3, count.get());
      }
  
      @Test
      public void testRangeWithZero() {
          Flowable.rangeLong(1, 0);
      }
  
      @Test
      public void testRangeWithOverflow2() {
          Flowable.rangeLong(Long.MAX_VALUE, 0);
      }
  
      @Test
      public void testRangeWithOverflow3() {
          Flowable.rangeLong(1, Long.MAX_VALUE);
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testRangeWithOverflow4() {
          Flowable.rangeLong(2, Long.MAX_VALUE);
      }
  
      @Test
      public void testRangeWithOverflow5() {
          assertFalse(Flowable.rangeLong(Long.MIN_VALUE, 0).blockingIterable().iterator().hasNext());
      }
  
      @Test
      public void testBackpressureViaRequest() {
          Flowable<Long> o = Flowable.rangeLong(1, Flowable.bufferSize());
  
          TestSubscriber<Long> ts = new TestSubscriber<Long>(0L);
  
          ts.assertNoValues();
          ts.request(1);
  
          o.subscribe(ts);
  
          ts.assertValue(1L);
  
          ts.request(2);
          ts.assertValues(1L, 2L, 3L);
  
          ts.request(3);
          ts.assertValues(1L, 2L, 3L, 4L, 5L, 6L);
  
          ts.request(Flowable.bufferSize());
          ts.assertTerminated();
      }
  
      @Test
      public void testNoBackpressure() {
          ArrayList<Long> list = new ArrayList<Long>(Flowable.bufferSize() * 2);
          for (long i = 1; i <= Flowable.bufferSize() * 2 + 1; i++) {
              list.add(i);
          }
  
          Flowable<Long> o = Flowable.rangeLong(1, list.size());
  
          TestSubscriber<Long> ts = new TestSubscriber<Long>(0L);
  
          ts.assertNoValues();
          ts.request(Long.MAX_VALUE); // infinite
  
          o.subscribe(ts);
  
          ts.assertValueSequence(list);
          ts.assertTerminated();
      }
      void testWithBackpressureOneByOne(long start) {
          Flowable<Long> source = Flowable.rangeLong(start, 100);
  
          TestSubscriber<Long> ts = new TestSubscriber<Long>(0L);
          ts.request(1);
          source.subscribe(ts);
  
          List<Long> list = new ArrayList<Long>(100);
          for (long i = 0; i < 100; i++) {
              list.add(i + start);
              ts.request(1);
          }
          ts.assertValueSequence(list);
          ts.assertTerminated();
      }
      void testWithBackpressureAllAtOnce(long start) {
          Flowable<Long> source = Flowable.rangeLong(start, 100);
  
          TestSubscriber<Long> ts = new TestSubscriber<Long>(0L);
          ts.request(100);
          source.subscribe(ts);
  
          List<Long> list = new ArrayList<Long>(100);
          for (long i = 0; i < 100; i++) {
              list.add(i + start);
          }
          ts.assertValueSequence(list);
          ts.assertTerminated();
      }
      @Test
      public void testWithBackpressure1() {
          for (long i = 0; i < 100; i++) {
              testWithBackpressureOneByOne(i);
          }
      }
      @Test
      public void testWithBackpressureAllAtOnce() {
          for (long i = 0; i < 100; i++) {
              testWithBackpressureAllAtOnce(i);
          }
      }
      @Test
      public void testWithBackpressureRequestWayMore() {
          Flowable<Long> source = Flowable.rangeLong(50, 100);
  
          TestSubscriber<Long> ts = new TestSubscriber<Long>(0L);
          ts.request(150);
          source.subscribe(ts);
  
          List<Long> list = new ArrayList<Long>(100);
          for (long i = 0; i < 100; i++) {
              list.add(i + 50);
          }
  
          ts.request(50); // and then some
  
          ts.assertValueSequence(list);
          ts.assertTerminated();
      }
  
      @Test
      public void testRequestOverflow() {
          final AtomicInteger count = new AtomicInteger();
          int n = 10;
          Flowable.rangeLong(1, n).subscribe(new DefaultSubscriber<Long>() {
  
              @Override
              public void onStart() {
                  request(2);
              }
  
              @Override
              public void onComplete() {
                  //do nothing
              }
  
              @Override
              public void onError(Throwable e) {
                  throw new RuntimeException(e);
              }
  
              @Override
              public void onNext(Long t) {
                  count.incrementAndGet();
                  request(Long.MAX_VALUE - 1);
              }});
          assertEquals(n, count.get());
      }
  
      @Test
      public void testEmptyRangeSendsOnCompleteEagerlyWithRequestZero() {
          final AtomicBoolean completed = new AtomicBoolean(false);
          Flowable.rangeLong(1, 0).subscribe(new DefaultSubscriber<Long>() {
  
              @Override
              public void onStart() {
  //                request(0);
              }
  
              @Override
              public void onComplete() {
                  completed.set(true);
              }
  
              @Override
              public void onError(Throwable e) {
  
              }
  
              @Override
              public void onNext(Long t) {
  
              }});
          assertTrue(completed.get());
      }
  
      @Test(timeout = 1000)
      public void testNearMaxValueWithoutBackpressure() {
          TestSubscriber<Long> ts = new TestSubscriber<Long>();
          Flowable.rangeLong(Long.MAX_VALUE - 1L, 2L).subscribe(ts);
  
          ts.assertComplete();
          ts.assertNoErrors();
          ts.assertValues(Long.MAX_VALUE - 1L, Long.MAX_VALUE);
      }
  
      @Test(timeout = 1000)
      public void testNearMaxValueWithBackpressure() {
          TestSubscriber<Long> ts = new TestSubscriber<Long>(3L);
          Flowable.rangeLong(Long.MAX_VALUE - 1L, 2L).subscribe(ts);
  
          ts.assertComplete();
          ts.assertNoErrors();
          ts.assertValues(Long.MAX_VALUE - 1L, Long.MAX_VALUE);
      }
  
      @Test
      public void negativeCount() {
          try {
              Flowable.rangeLong(1L, -1L);
              fail("Should have thrown IllegalArgumentException");
          } catch (IllegalArgumentException ex) {
              assertEquals("count >= 0 required but it was -1", ex.getMessage());
          }
      }
  
      @Test
      public void countOne() {
          Flowable.rangeLong(5495454L, 1L)
              .test()
              .assertResult(5495454L);
      }
  
      @Test
      public void fused() {
          TestSubscriber<Long> to = SubscriberFusion.newTest(FusedQueueSubscription.ANY);
  
          Flowable.rangeLong(1, 2).subscribe(to);
  
          SubscriberFusion.assertFusion(to, FusedQueueSubscription.SYNC)
          .assertResult(1L, 2L);
      }
  
      @Test
      public void fusedReject() {
          TestSubscriber<Long> to = SubscriberFusion.newTest(FusedQueueSubscription.ASYNC);
  
          Flowable.rangeLong(1, 2).subscribe(to);
  
          SubscriberFusion.assertFusion(to, FusedQueueSubscription.NONE)
          .assertResult(1L, 2L);
      }
  
      @Test
      public void disposed() {
          TestHelper.checkDisposed(Flowable.rangeLong(1, 2));
      }
  
      @Test
      public void fusedClearIsEmpty() {
          TestHelper.checkFusedIsEmptyClear(Flowable.rangeLong(1, 2));
      }
  
      @Test
      public void noOverflow() {
          Flowable.rangeLong(Long.MAX_VALUE - 1, 2);
          Flowable.rangeLong(Long.MIN_VALUE, 2);
          Flowable.rangeLong(Long.MIN_VALUE, Long.MAX_VALUE);
      }
  
      @Test
      public void conditionalNormal() {
          Flowable.rangeLong(1L, 5L)
          .filter(Functions.alwaysTrue())
          .test()
          .assertResult(1L, 2L, 3L, 4L, 5L);
      }
  
      @Test
      public void badRequest() {
          TestHelper.assertBadRequestReported(Flowable.rangeLong(1L, 5L));
  
          TestHelper.assertBadRequestReported(Flowable.rangeLong(1L, 5L).filter(Functions.alwaysTrue()));
      }
  
      @Test
      public void conditionalNormalSlowpath() {
          Flowable.rangeLong(1L, 5L)
          .filter(Functions.alwaysTrue())
          .test(5)
          .assertResult(1L, 2L, 3L, 4L, 5L);
      }
  
      @Test
      public void conditionalSlowPathTakeExact() {
          Flowable.rangeLong(1L, 5L)
          .filter(Functions.alwaysTrue())
          .take(5)
          .test()
          .assertResult(1L, 2L, 3L, 4L, 5L);
      }
  
      @Test
      public void slowPathTakeExact() {
          Flowable.rangeLong(1L, 5L)
          .filter(Functions.alwaysTrue())
          .take(5)
          .test()
          .assertResult(1L, 2L, 3L, 4L, 5L);
      }
  
      @Test
      public void conditionalSlowPathRebatch() {
          Flowable.rangeLong(1L, 5L)
          .filter(Functions.alwaysTrue())
          .rebatchRequests(1)
          .test()
          .assertResult(1L, 2L, 3L, 4L, 5L);
      }
  
      @Test
      public void slowPathRebatch() {
          Flowable.rangeLong(1L, 5L)
          .rebatchRequests(1)
          .test()
          .assertResult(1L, 2L, 3L, 4L, 5L);
      }
  
      @Test
      public void slowPathCancel() {
          TestSubscriber<Long> ts = new TestSubscriber<Long>(2L) {
              @Override
              public void onNext(Long t) {
                  super.onNext(t);
                  cancel();
                  onComplete();
              }
          };
  
          Flowable.rangeLong(1L, 5L)
          .subscribe(ts);
  
          ts.assertResult(1L);
      }
  
      @Test
      public void fastPathCancel() {
          TestSubscriber<Long> ts = new TestSubscriber<Long>() {
              @Override
              public void onNext(Long t) {
                  super.onNext(t);
                  cancel();
                  onComplete();
              }
          };
  
          Flowable.rangeLong(1L, 5L)
          .subscribe(ts);
  
          ts.assertResult(1L);
      }
  
      @Test
      public void conditionalSlowPathCancel() {
          TestSubscriber<Long> ts = new TestSubscriber<Long>(1L) {
              @Override
              public void onNext(Long t) {
                  super.onNext(t);
                  cancel();
                  onComplete();
              }
          };
  
          Flowable.rangeLong(1L, 5L)
          .filter(Functions.alwaysTrue())
          .subscribe(ts);
  
          ts.assertResult(1L);
      }
  
      @Test
      public void conditionalFastPathCancel() {
          TestSubscriber<Long> ts = new TestSubscriber<Long>() {
              @Override
              public void onNext(Long t) {
                  super.onNext(t);
                  cancel();
                  onComplete();
              }
          };
  
          Flowable.rangeLong(1L, 5L)
          .filter(Functions.alwaysTrue())
          .subscribe(ts);
  
          ts.assertResult(1L);
      }
  
      @Test
      public void conditionalRequestOneByOne() {
          TestSubscriber<Long> ts = new TestSubscriber<Long>(1L) {
              @Override
              public void onNext(Long t) {
                  super.onNext(t);
                  request(1);
              }
          };
  
          Flowable.rangeLong(1L, 5L)
          .filter(new Predicate<Long>() {
              @Override
              public boolean test(Long v) throws Exception {
                  return v % 2 == 0;
              }
          })
          .subscribe(ts);
  
          ts.assertResult(2L, 4L);
      }
  
      @Test
      public void conditionalRequestOneByOne2() {
          TestSubscriber<Long> ts = new TestSubscriber<Long>(1L) {
              @Override
              public void onNext(Long t) {
                  super.onNext(t);
                  request(1);
              }
          };
  
          Flowable.rangeLong(1L, 5L)
          .filter(Functions.alwaysTrue())
          .subscribe(ts);
  
          ts.assertResult(1L, 2L, 3L, 4L, 5L);
      }
  
      @Test
      public void fastPathCancelExact() {
          TestSubscriber<Long> ts = new TestSubscriber<Long>() {
              @Override
              public void onNext(Long t) {
                  super.onNext(t);
                  if (t == 5L) {
                      cancel();
                      onComplete();
                  }
              }
          };
  
          Flowable.rangeLong(1L, 5L)
          .subscribe(ts);
  
          ts.assertResult(1L, 2L, 3L, 4L, 5L);
      }
  
      @Test
      public void conditionalFastPathCancelExact() {
          TestSubscriber<Long> ts = new TestSubscriber<Long>() {
              @Override
              public void onNext(Long t) {
                  super.onNext(t);
                  if (t == 5L) {
                      cancel();
                      onComplete();
                  }
              }
          };
  
          Flowable.rangeLong(1L, 5L)
          .filter(new Predicate<Long>() {
              @Override
              public boolean test(Long v) throws Exception {
                  return v % 2 == 0;
              }
          })
          .subscribe(ts);
  
          ts.assertResult(2L, 4L);
      }
  }
  